in magnetic disk the data recorded as magnetic orientation of material used in the surface of disk ,as we use digital data that have two value 1 or 0 so data are recorded based on the concept specified , here lazer rays changes the magnetic orientation of material for 1 and 0 , there is many types of disk in market but the bais c princiapal is same there is some alogorithem are used for data access and for writting .
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11:14 PM on December 16, 2009